392 



PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxviii. 



III. Coluiut'l la I I'liiillu'ca al)siMit 



Septa |>crf(irat(' iK'ar) 



axisan.lt.-i. ( ^- ^''•"Ml'»^osa 



Septa larjj;ely iktIo-j 



regorj'.f 



S[)()n<j;y, or rud iiiicn-^ rate; mi dissi-pi-} (>. Fi'i'di la Gregory. 

 parietal . ' tary 



nieiitti ' 



Dis.sepimentH hiijlilvl - ,„ • -.- , , 



, , , "^ • ]■ I . /7/(/.s'o.svT(.s\ aughan.'' 

 I. develoiieu > 



IV. {'(.lumella 



sp(Hiijry, 



p r o 111 i - 



neiit 



V. Columel lai I'lpitlieca aliHentiSepta j)erforate near 



.spongy, i or rudinien-^ axis and near sur-}^ tl. .Ut'tethmos Gregory. 



paiiillary. J taiy 



A^I. Colnniella 



composed 



Epitheeaappar-p^Pta apparently per- L() /./„,,,,,,;, ^e Fro- 



entlvabsent.. '"•"^^^^ ^*'""^' "I'l'^'' mental, 



edge 



Epitheca eom-iSepta little compactl ., r •,, • t- i 

 ■ ' > ,, f ^- i^illiosen.^ Kol)y, 



l>leto I ( "peucompactefi ) J 



ea 

 *n-< axis and near s 

 . . I face, .solid l>elo\v 



of com- 

 p ress e d 



fiis.'d tni- 

 IiiTula 



1. Genus GYROSERIS Reuss. 



1854. Gi/roseris Kei's.s, Denksclirilt. Akat 

 VII, p. 126. 



Wiss. Wien, :\lat. Natiirhist. CI., 



Geiiu.s referred to the Lojthoserlnx of jNIilne Edwtird.s and Haiiiie. 



Oi'ujlndl (jeut'i'ic dia<jno.sif<. — "Coralluin free, .simple, di.scoid or low- 

 conical. Septa numerous, luiited b}' sjnapticula. Papillaiy columella. 

 Wall low, conical, with thick, concentrically wav}' epitheca." 



TfjjM' Kpecies. — (lyroKcvls pateJlaris Reuss, Denkschr. Akad. Wiss. 

 Wien, Mat. Naturhist. CI., VII, p. 126, pi. vii, tios. 12-15. 



Remai'l's. — By neither Milne Edwards and Haime nor Duncan is 

 anythino- additional oiven reg-arding thi.s genus. Felix, however, 

 in his Anthozoen der (xosauschichten in den Ostalpen,'' saj's: "1 

 should like to remark in addition to the description of Reuss that a 

 columella either is al)sent or remains rudimentary. Isolated dis.sepi- 

 ments, as well as .synapticula, occur between the septa. The septa 

 orig-inalh' are porous (*• werden poros an^elegt'), but appear to become 

 compact." 



This genus appears very closely related to Leptopliyllia. If the 

 wall should be perforate the only means of dili'erentiation is the thick, 

 concentrically wavy epitheca, a character of doubtful diagnostic value. 



« It is possible that the wall of this genus is solid. In that case it would belong 

 near Gyroseris. 

 . ''This geiuis may have a jiapillary columella. 



'^■Paheontographica, XLIX, 190;], p. 226. 



